From: Herbert Xu herbert@gondor.apana.org.au
commit 10a2f0b311094ffd45463a529a410a51ca025f27 upstream.
The setkey function for GCM/CCM algorithms didn't verify the key length before copying the key and subtracting the salt length.
This patch delays the copying of the key til after the verification has been done. It also adds checks on the key length to ensure that it's at least as long as the salt.
Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver") Cc: stable@vger.kernel.org Reported-by: kiyin(尹亮) kiyin@tencent.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/crypto/bcm/cipher.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
--- a/drivers/crypto/bcm/cipher.c +++ b/drivers/crypto/bcm/cipher.c @@ -2930,7 +2930,6 @@ static int aead_gcm_ccm_setkey(struct cr
ctx->enckeylen = keylen; ctx->authkeylen = 0; - memcpy(ctx->enckey, key, ctx->enckeylen);
switch (ctx->enckeylen) { case AES_KEYSIZE_128: @@ -2946,6 +2945,8 @@ static int aead_gcm_ccm_setkey(struct cr goto badkey; }
+ memcpy(ctx->enckey, key, ctx->enckeylen); + flow_log(" enckeylen:%u authkeylen:%u\n", ctx->enckeylen, ctx->authkeylen); flow_dump(" enc: ", ctx->enckey, ctx->enckeylen); @@ -3000,6 +3001,10 @@ static int aead_gcm_esp_setkey(struct cr struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__); + + if (keylen < GCM_ESP_SALT_SIZE) + return -EINVAL; + ctx->salt_len = GCM_ESP_SALT_SIZE; ctx->salt_offset = GCM_ESP_SALT_OFFSET; memcpy(ctx->salt, key + keylen - GCM_ESP_SALT_SIZE, GCM_ESP_SALT_SIZE); @@ -3028,6 +3033,10 @@ static int rfc4543_gcm_esp_setkey(struct struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__); + + if (keylen < GCM_ESP_SALT_SIZE) + return -EINVAL; + ctx->salt_len = GCM_ESP_SALT_SIZE; ctx->salt_offset = GCM_ESP_SALT_OFFSET; memcpy(ctx->salt, key + keylen - GCM_ESP_SALT_SIZE, GCM_ESP_SALT_SIZE); @@ -3057,6 +3066,10 @@ static int aead_ccm_esp_setkey(struct cr struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__); + + if (keylen < CCM_ESP_SALT_SIZE) + return -EINVAL; + ctx->salt_len = CCM_ESP_SALT_SIZE; ctx->salt_offset = CCM_ESP_SALT_OFFSET; memcpy(ctx->salt, key + keylen - CCM_ESP_SALT_SIZE, CCM_ESP_SALT_SIZE);